Materials Literature
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Studied were evolution of dislocation structure, phase, and element composition of binary alloys Zr-1Nb and Zr-2.5Nb and multicomponent alloys Zr-1Nb-1.2Sn-0.4Fe and Zr-1.2Sn-0.4Fe under neutron irradiation. The investigations were carried out using cladding and pressure tubes before and after irradiation to a fluence…
Soluble collagen from fish (sardine) scales was yielded at about 5% with 0.5 M acetic acid after demineralization with EDTA, while a great portion of the collagen remained insoluble. The solubility of this insoluble collagen was about 20% at 45 degrees C (denaturation temperature of soluble collagen) for 24 h. The rem…
A general route has been developed to chemically modify a series of poly(ethylene oxide)-poly(propylene oxide) triblock copolymers with molecular weights from 6500 to 14600. It is initiated by the introduction of p-nitrophenyl groups; such nitrophenyl conjugated copolymers are stable in an organic milieu and in a dry…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTPhotomodulated Blocking of Gramicidin Ion ChannelsLinda Lien, Dominic C. J. Jaikaran, Zhihua Zhang, and G. Andrew WoolleyView Author Information Department of Chemistry, University of Toronto 80 St. George Street, Toronto, M5S 3H6, Canada Cite this: J. Am. Chem. Soc. 1…
We have studied the equilibrium structure of a grafted polymer layer composed of two distinct species of homopolymers, the “binary brush”, in various solvent conditions. By using a coarse-grained simulation method that involves direct calculation of the Edwards hamiltonian, we are able to simulate much larger systems…
A series of mixed-substituent poly(organophosphazenes) with ethyleneoxy side groups has been synthesized. These polymers possess multiple electron-donor coordination sites that can form complexes with metal salts and generate “solid electrolyte” behavior. The polymers were characterized by 31 P, 1 H, and 13 C NMR spec…
The synthesis and solution and thin film characterization of four octasubstituted phthalocyanines (Pcs) are reported. [2,3,9,10,16,17,23,24-octakis(dodecylcarboxylato)phthalocyaninato]copper, [2,3,9,10,16,17,23,24-octakis( N -dodecylamide)phthalocyaninato]copper, and [2,3,9,10,16,17,23,24-octakis(2-(benzyloxy)ethoxy)p…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTMorphological Characteristics of SEBS Thermoplastic Elastomer GelsJonathan H. Laurer, Rudy Bukovnik, and Richard J. SpontakView Author Information Department of Materials Science & Engineering, North Carolina State University, Ralei…
Chemical interactions at molecular interfaces have been studied by integrated optics evanescent wave surface-enhanced Raman spectroscopy (IO-EWSERS). We describe methods to decorate planar glass waveguides with two-dimensional aggregates of Rayleigh limit silver particles by covalent attachment of them through a propa…
Abstract
Michael J. Danson, David W. Hough, Rupert J.M. Russell, Garry L. Taylor, Laurence Pearl; Enzyme thermostability and thermoactivity, Protein Engineering, Design
Magnesium calcite with unusual magnesium contents up to 14 mol% crystallizes from water–alcohol mixtures. Morphological changes result from interactions of solvent and Mg2+ with specific planes of the growing crystals.
The pyridineselenolate (2-Se-NC(5)H(4), (SePy)) and the 3-(trimethylsilyl)pyridineselenolate (3-Me(3)Si-2-Se-NC(5)H(4) (SePy)) ligands form air-stable homoleptic coordination compounds of Cu(I) { [Cu(SePy)](4) (1) and [Cu(SePy)](4) (2)} and In(III) {In(SePy)(3) (3) and In(SePy)(3) (4)}. Mass spectroscopic characteriza…
Physical organogels of cholesteryl anthraquinone-2-carboxylate (CAQ) and an organic liquid have been studied by small-angle neutron and X-ray scattering techniques. The gel structure consists of long and rigid fibers of CAQ interconnected in swollen lyotropic microdomains. The nature of the “junction zones” of the thr…
Structural investigations using EXAFS spectroscopy and standard analytical methods were performed on electrochemically synthesized tetrabutylammonium bromide stabilized Pd/Pt bimetallic clusters with different Pd/Pt ratios. The results of these investigations allow the determination of a detailed model concerning the…
A series of cyclic aromatic disulfide oligomers have been synthesized in high yields by catalytic oxidization of arenedithiols in DMAc. The aryl groups contain moieties such as ketone, sulfone, isopropylidene, ether, thioether, and phenylphosphine oxide groups. The cyclic aromatic disulfide oligomers have been analyze…
The synthesis of a range of hydroxypyranones and hydroxypyridinones with potential for the chelation of indium(III) is described. The crystal structures of two of the indium complexes are presented. The distribution coefficients of the ligands and the corresponding iron(III), gallium(III), and indium(III) complexes ar…
The reaction of Pb and Eu with a molten mixture of A(2)Se/P(2)Se(5)/Se produced the quaternary compounds APbPSe(4), A(4)Pb(PSe(4))(2) (A = Rb,Cs), and K(4)Eu(PSe(4))(2). The red crystals of APbPSe(4) are stable in air and water. The orange crystals of A(4)Pb(PSe(4))(2) and K(4)Eu(PSe(4))(2) disintegrate in water and o…
The group refractive index and physical thickness of dry and hydrated type I collagen films are measured using optical low-coherence reflectometry. The average value for the group refractive index of dry and fully hydrated collagen films at lo = 850 nm is, respectively, 1.53 6 0.02, and 1.43 6 0.02. The physical thick…
We study spatially ordered phases in a rod−coil diblock copolymer melt. In the weak segregation limit, we solve the self-consistent field equations by a partial numerical evaluation of the single chain partition function. In the strong segregation limit, we resort to a brushlike approximation. The structural asymmetry…